Heat Transfer Enter value Select BTU/hour square foot °F calorie/second square centimeter °C CHU/hour square foot °C joule/second square meter K kilocalorie/hour square foot °C kilocalorie/hour square meter °C watt/square meter °C watt/square meter K BTU/hour square foot °F calorie/second square centimeter °C CHU/hour square foot °C joule/second square meter K kilocalorie/hour square foot °C kilocalorie/hour square meter °C watt/square meter °C watt/square meter K people found this article helpful. What about you?